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'N M d l.) 0 e A. WHITE & D. F. SULLIVAN.

I STUP MDTION FOR CIRCULAR KNITTING MACHINES. No. 588,760.

Patented Aug. 24, 1897'.

F 5 FE 'ATT'Y.

INVENTEJRE: 2' Wm? ,9- W m fizw W ITN 5555. fWZLA/Q UNITED STATES PATENT j OFFICE.

ALBERT WHITE AND D IELE;- suL ivAN, OF LOWELL, MASSACHUSETTS; SAID SULLIVAN ASSIGNOR TO MAnYsULLIvAN, on SAME PLACE.

STOP-MOTION FOR CIRCULAR-KNITTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 588,760, dated August 24 18.97.

Application filed December 11, 1896. Serial No. 615,292. (No model.)

T0 aZl whom it may concern:

Be it known that we, ALBERT WHITE and DANIEL F. SULLIVAN, of Lowell, county of Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in Stop-Motions for Circular-Knitting Machines, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming apart of this specification, in which Figure 1 is an elevation, partly in section, of a portion of the bed of a circular-knitting machine, showing our invention Fig. 2, a top plan view of the same; Fig. 3, a Vertical transverse section taken on line 3 3 in Fig. 2 and looking toward the left; Fig. 4, an elevation looking from the right in Fig. 3; Fig. 5, a detail elevation showing the trip carried by the needle-cylinder; Fig. 6, asectional perspective enlarged showing the presser-wheel-locking mechanism; Fig. 7, an elevation of the presser-Wheel support.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

Our invention is designed especially as an improvement on the device shown and described in our pending application for United States Patent, Serial No. (306,121, filed September 17, 1896.

The particular object of ourpresentinvention is to provide means for supporting the drop-Wire so that it will not fall when the ordinary hand-shipper is employed to stop the machine, or the stop-motion in common use, which is actuated when an imperfection or hole occurs in the web.

The nature and operation of the improvement will be readily understood by those conve'rsant with such matters from the following explanations.

In the drawings, A' represents the needlecylinder, 0 the bed of the machine, T the needles, and D the spring-pulled hand shipping lever, these parts being all of the ordinaryconstruction and arrangement.

On a spindle 50 there is mounted a block w, said spindle being adjustable by means of a star-box h in the usual manner. The rotary presser-wheel B, mounted to revolve on a support y, is pivoted at p to rock toward the needles in the block w. The support y of the presser has a pendent arm 30, and bears on its rear face a pin 00, which normally engages the face of an angle-lever s, pivoted at c to swing vertically on the inner face of the block to, and in which there is a hole 25, (seeFig. 6,) which may be brought to register with said pin :0 and release the presser from contact with the needles T; Mounted on the same pivot 19, to swing in like direction, there is a support or, in whicha block 52 is pivoted at 51 to rock at right angles to the direction of said block or. This block 52 carries a blade 7c, which may be thrown into the path of projections t on the under face of the presser-wheel D. The drop-wire h is sup ported from the tilting block 52 and has a shoulder 60 thereon, (see Fig. 4,) said dropwire being extended and passing under the looper-support' L, where it rests upon the thread below the thread-guide g. On the block W there are two pins q 1', which engage, respectively, the upper and lower edges of free arm of the anglelever s and actuate said lever when the block at is rocked outward by the engagement of the presser-wheel projections i with the blade k, so that the hole 25 shallregister with the pin as on the presser-wheel support.

The mechanism thus far described is identical with that shown in the application above referred to and is'not herein claimed specifically when in and of itself considered.

Journaled in the bed and running from the front to the rear thereof there is a rock-shaftj, on which there is a orank-ar1nl 6, and a handle 22, by which said shaft may be rocked by hand to reset the device, ashereinafter specified. Pivoted to the outer end of crank-arm 16 there is'a rod 17, which extends to and has its end hooked to overlap the hand-shipper D. This hand-shipper is pulled by a spring d, connecting with a boss f in the usual manner, and is held against the tension of said spring by abossb on the bed, the parts being arranged so that by springing the shipper D 7', by means of the handle downward slightly it will pass under said boss I) and permit the spring (1 to act.

J ournaled in the bed adjacent the presserwheel mechanism there is a vertically arranged rock-shaft 15, on the upper endridge of which there is a radially-proj ectin g arm 21, designed to be carried under the shoulder of the drop-wire hand support said wire. On the lower end of the rock-shaft 15 there is an arm 20, connected by a pivoted rod 19 with the main rock-shaft j.

On the needle-cylinder there is a tubular casing 31, vertically arranged and provided with a right-angle notch 72 or shoulder in its upper edge. Fitted to slide vertically in this tubular casing there is an inverted- U -shaped wire trip the ends of which, 33 and 34, are bent at right angles to thebody of-said trip and at right angles to each other. This trip is nom inally disposed on the casing, at the top 39, at the edge of the depression or notch 72, the end thereof being thus projected into the path of the pendent finger 30 of the presser-wheel bearing when said bearinghas been released by the operation of the stop mechanism.

On the bed 0 there is arranged a horizontal swinging bell-crank lever, one arm 2% of which has its end arranged adjacent the needle-cylinder, whereby it maybe struck by the end 34 of the trip 32 when said trip has been dropped into the notch '72. The opposite arm 25 of the bell-crank is bent downward over the front edge of the bed C at 25 and its lower end is beveled at 26 (see Fig. 1) to engage the handshipper D, when said bell-crank is actuated by the trip, and spring said shipper downward under the boss I), permitting spring (Z to act.

In the use of our invention normally the arm 21 on the vertical rock-shaft is out of contact with the drop-wire h and the foot 33 011 the trip-arm 32 will pass the pendent arm 30 on the presser-wheel support as the cylinder rotates. When the shipper I) is employed by hand to stop the machine and is thrown from left to right as viewed in Fig. 2, the connecting-rod 17 will rock the horizontal shaft j proportionately, and by means of the connection 19 the vertical rock-shaft is actuated correspondingly and its arm 21 thereby projected under the shoulder 60 of the drop-wire 7a, which prevents the falling of said wire as the thread slacks and the consequent releasing of the presser-wheel mechanism. This same action would also take place when the hand-shipper is operated by the ordinary stopmotion employed for imperfections or holes in the web. \Vhen the shipper is set again, it is necessary for the operator to rock shaft 22, by hand in order to release the drop-wire from the arm 21. \Vhen the thread breaks, letting the dropwire fall and projecting the blade 76 into the path of the projections t' on the presser, the block mis thrown inward, actuating the right- .angle lever s and releasing the presser-wheel support, so that its pin will enter the hole 6 of said lever s. This operation is identical with that shown in the application above referred to, and the pendent arm 30 on the presser-wheel support is thereby thrown in position to engage the foot 33 of the trip 32, turning it so that it will drop into the notch 7 2 of its casing and assume the position shown by dotted lines in Fig. 5. As thus disposed, its foot 34 projects radially from the needlecylinder, and at the completion of the next course or rotation of said cylinder said foot will engage the arm 2a of the bell-crank lever, rocking the same, so that its beveled end 26 will engage and throw the hand-shipper downward free of the boss 11. Its spring d, now operating as before, moves said shipper to stop the machine and simultaneously rocks the vertical shaft 15, projecting the arm 21 thereon under the shoulder of the drop-wire, as before described.

Having thus described our invention, what We claim is- 1. In a circular-knitting machine a mechanism operated positively by a movement of the hand-shipper to project a support under the thread-supported drop-wire of the stopmotion.

2. In a stop-motion for circular-knitting machines a thread-supported drop-wire; movable presser-so pportin g mechanism; a trip on the needle-cylinder set by said mechanism; and mechanism operated by said trip for actuating the hand-shipper.

3. In a stop-motion for circular-knitting machines a thread-supported drop-wi re; movable pressersupporting mechanism; a trip on the needle-cylinder set by said mechanism; mechanism operated by said trip for actuating the hand-shipper; and devices actuated by the movement of said shipper for projecting a support under said drop-wire.

4. In a stop-motion for circular-knitting machines, a presser release mechanism embodying a thread-supported drop'wire,in combination with a hand-shipper, a rock-shaft actuated by the movement thereof; and asupport projected under said drop-wire by the rocking of said shaft, substantially as described.

5. The trip on the needle-cylinder,tl1ehandshipper, and the lever actuated by said trip for releasing said shipper, in combination with the movable presser-support having a projection adapted to engage and set said trip, substantially as specified.

(5. In a circular-knitting-machine stop-motion embodying a thread-supported drop-wire, a hand shipper and mechanism operated thereby for projecting a support under said drop-wire to prevent it releasing said stop mechanism.

ALBERT IVI'IITE. DANIEL l SULLIVAN. lVitnesscs:

O. M. SHAW, T. M. SHUTE. 

